 
|
Audio Asylum Thread Printer Get a view of an entire thread on one page |
For Sale Ads |
|
|
Audio Asylum Thread Printer Get a view of an entire thread on one page |
For Sale Ads |
24.231.207.14
In Reply to: Re: Speaking of EF86s-- they do make one, but it's not the Mullard 520 posted by ARC on July 25, 2006 at 19:43:41:
I think your speaking of the vta board and that uses 12at7s when you use that with right output tubes its fantastic..I use 12bh7s in mine for the phase splitter and the 12at7 for the driver and I have a triode board laying around somewhere and I wasnt aware of it taking ef86s..That VTA board you speak of just smokes the curcio from A to Z but that doesnt take much. Now are you saying the current triode board runs an ef86?
mike
Follow Ups:
The board from Triode always ran EF86s; the change to 6AU6s was quite recent and not well recieved, so the EF86 board is now simultaneously available again. One curiosity from your post: I can't imagine the connection between the VTA INPUT board and "using the right output tubes" having some synergy--except possibly for the fact that great tubes like EL34 require less grid drive than 6L6GC, making it easier for the 12AT7s to throw signal down. I'm assuming you use 12AT7 as V1 for each channel voltage amplifier stage and then the 12BH7 is shared as the splitter.... I ran mine in much the same way before I put the triode EF86 board in. The VTA WAS a big improvement over the 7199 stock board, but really, the EF86 is just SUCH a musical, linear, non-microphonic, and low distortion tube that it's really the only way to fly. I had to futz around with a wide variety of 12AT7s in the VTA to get it right; Mullard CV4024s were nice, but the best turned out to be good old USA blackplate RCAs. The Triode board took the amp to a totally new level of transparency.
ARC
Thats it..The vta board has such good linear drive and I run 6l6gcs or even kt66s in my one st70 and being the board has such great drive and the 6L6s and kt66s take more drive,that circuit does it without breaking a sweat.THe el34s dont take anything to drive those.
The Triode Electronics board does indeed use 2 EF86's and 1 12AU7 or 1 12BH7 depending on which power tube configuration you choose. I've been running it in my ST-70 for a few years now and it sounds terrific. We've compared my modified ST-70 to more expensive production amps and it can hold it's own. A side benefit is the Triode Electronics board, with minor adjustments, allows you to experiment with a variety of power tubes in the ST-70.
The vta does that to..I have actually run kt88s in my st70 with great success but I usually run 6l6gc black plates which I cant find any el34 to compete with that sound of that tube..THe closest thing I have would be my telefunken el34s and even those arent like RCA black plates.
This post is made possible by the generous support of people like you and our sponsors:
Top of Page ]
[ Contact Us ]
[ Support/Wish List ]
[ Copyright © 2024, Audio Asylum, all rights reserved ]
